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Full text of "Scientific Papers - Vi"

915]
..EOLIAN TONES
325
, draught, where the observer is on the high pressure side, is not necessary ; a a few minutes any one may prepare a little apparatus competent to show he effect. Fig. 3 almost explains itself. A is the drawn out glass tube
B
Fig. 3.
5 the loop of iron or brass wire (say 1 mm. in diameter), attached to the tube rith the aid of a cork 0. The rubber prolongation is not shown. Held in he crack of a slightly opened door or window, the arrangement yields a sound irhich is often pure and fairly steady.of the